All releases of Aliens

Release Notes: Game state saved when you quit, so you can restart the program later and continue your game. XPM image files reduced to a maximum of 16 colors each. Sound patches from Agenda Computing applied. Infinite lives (game-over/pause-related) bug fixed.

Release Notes: The "Swooping" game variation has been (mostly) finished. A "Marching"
game variation has been added. An options screen has been
started. Piezo-buzzer-based sound effects have been added.